Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2006 Dec 1;314(5804):1424-7.
doi: 10.1126/science.1134408. Epub 2006 Oct 26.

Fast variability of tera-electron volt gamma rays from the radio galaxy M87

F Aharonian  1 , A G Akhperjanian, A R Bazer-Bachi, M Beilicke, W Benbow, D Berge, K Bernlöhr, C Boisson, O Bolz, V Borrel, I Braun, A M Brown, R Bühler, I Büsching, S Carrigan, P M Chadwick, L-M Chounet, G Coignet, R Cornils, L Costamante, B Degrange, H J Dickinson, A Djannati-Ataï, L O'c Drury, G Dubus, K Egberts, D Emmanoulopoulos, P Espigat, F Feinstein, E Ferrero, A Fiasson, G Fontaine, Seb Funk, S Funk, M Füssling, Y A Gallant, B Giebels, J F Glicenstein, P Goret, C Hadjichristidis, D Hauser, M Hauser, G Heinzelmann, G Henri, G Hermann, J A Hinton, A Hoffmann, W Hofmann, M Holleran, S Hoppe, D Horns, A Jacholkowska, O C de Jager, E Kendziorra, M Kerschhaggl, B Khélifi, Nu Komin, A Konopelko, K Kosack, G Lamanna, I J Latham, R Le Gallou, A Lemière, M Lemoine-Goumard, J-P Lenain, T Lohse, J M Martin, O Martineau-Huynh, A Marcowith, C Masterson, G Maurin, T J L McComb, E Moulin, M de Naurois, D Nedbal, S J Nolan, A Noutsos, K J Orford, J L Osborne, M Ouchrif, M Panter, G Pelletier, S Pita, G Pühlhofer, M Punch, S Ranchon, B C Raubenheimer, M Raue, S M Rayner, A Reimer, J Ripken, L Rob, L Rolland, S Rosier-Lees, G Rowell, V Sahakian, A Santangelo, L Saugé, S Schlenker, R Schlickeiser, R Schröder, U Schwanke, S Schwarzburg, S Schwemmer, A Shalchi, H Sol, D Spangler, F Spanier, R Steenkamp, C Stegmann, G Superina, P H Tam, J-P Tavernet, R Terrier, M Tluczykont, C van Eldik, G Vasileiadis, C Venter, J P Vialle, P Vincent, H J Völk, S J Wagner, M Ward
Affiliations

Fast variability of tera-electron volt gamma rays from the radio galaxy M87

F Aharonian et al. Science. .

Abstract

The detection of fast variations of the tera-electron volt (TeV) (10(12) eV) gamma-ray flux, on time scales of days, from the nearby radio galaxy M87 is reported. These variations are about 10 times as fast as those observed in any other wave band and imply a very compact emission region with a dimension similar to the Schwarzschild radius of the central black hole. We thus can exclude several other sites and processes of the gamma-ray production. The observations confirm that TeV gamma rays are emitted by extragalactic sources other than blazars, where jets are not relativistically beamed toward the observer.

PubMed Disclaimer

Comment in

Publication types

LinkOut - more resources